Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755394Ab3EUR1v (ORCPT ); Tue, 21 May 2013 13:27:51 -0400 Received: from webmail.solarflare.com ([12.187.104.25]:60016 "EHLO webmail.solarflare.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754916Ab3EUR1t (ORCPT ); Tue, 21 May 2013 13:27:49 -0400 Message-ID: <1369157265.2615.28.camel@bwh-desktop.uk.solarflarecom.com> Subject: Re: [PATCH v4 net-next 1/4] net: implement support for low latency socket polling From: Ben Hutchings To: Eliezer Tamir CC: Dave Miller , , , Jesse Brandeburg , Don Skidmore , , Willem de Bruijn , Andi Kleen , HPA , Or Gerlitz , Eilon Greenstien , Eliezer Tamir Date: Tue, 21 May 2013 18:27:45 +0100 In-Reply-To: <20130521142650.18498.71715.stgit@ladj378.jer.intel.com> References: <20130521142641.18498.52856.stgit@ladj378.jer.intel.com> <20130521142650.18498.71715.stgit@ladj378.jer.intel.com> Organization: Solarflare Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 (3.2.3-3.fc16) Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-Originating-IP: [10.17.20.137] X-TM-AS-Product-Ver: SMEX-10.0.0.1412-7.000.1014-19882.005 X-TM-AS-Result: No--12.495900-0.000000-31 X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1045 Lines: 24 On Tue, 2013-05-21 at 17:26 +0300, Eliezer Tamir wrote: > Adds a new ndo_ll_poll method and the code that supports and uses it. > This method can be used by low latency applications to busy poll ethernet > device queues directly from the socket code. The ip_low_latency_poll sysctl > entry controls how many cycles to poll. Set to zero to disable. [...] One more general point: why is this treated as an IPv4 option (in Kconfig and sysctls)? I don't have any particular expectation that it will be used with network protocols other than IPv4 and v6 any time soon, but logically it's not dependent on them. Ben. -- Ben Hutchings, Staff Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/